نتایج جستجو برای: physisorption

تعداد نتایج: 985  

Journal: :Physical chemistry chemical physics : PCCP 2012
Jyothirmai Ambati Hamzah Saiyed Stephen E Rankin

In this quantum chemical investigation, NH(3) physisorption onto a model of copper sulfate impregnated silica is compared with pure silica and copper sulfate adsorbents. The physisorption process is modeled as direct binding of the NH(3) molecule to the adsorption site of the dry adsorbents and as displacement of a H(2)O molecule by NH(3) in the hydrated complexes. The surface of silica is repr...

Journal: :Biomaterials 2008
Frank R Kloss Robert Gassner Johannes Preiner Andreas Ebner Karin Larsson Oliver Hächl Tarkan Tuli Michael Rasse Doris Moser Klaus Laimer Eike A Nickel Gerhard Laschober Regina Brunauer Günther Klima Peter Hinterdorfer Doris Steinmüller-Nethl Günter Lepperdinger

Medical implants are increasingly often inserted into bone of frail patients, who are advanced in years. Due to age, severe trauma or pathology-related bone changes, osseous healing at the implant site is frequently limited. We were able to demonstrate that coating of endosseous implants with nanocrystalline diamond (NCD) allows stable functionalization by means of physisorption with BMP-2. Str...

Journal: :Proceedings of the National Academy of Sciences of the United States of America 2004
H J Jänsch P Gerhard M Koch

NMR experiments of (129)Xe adsorbed on an iridium single crystal surface are reported. Very high nuclear polarization (P(z) approximately 0.7) makes the experiment possible. A coverage of less then one monolayer is investigated on the Ir(111) surface with an area of 0.8 cm(2). The observed resonance line shifts are very large and highly anisotropic. We find sigma(iso) = 1,032 +/- 11 ppm and sig...

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